Pianoforte.



No. 640,295. Patented Jan. 2, I900.

J. W. MABY.

PIANOFORTE.

(Application filed Sept. 14, 1898.)

(No Model.)

UNITED STATES PATENT OFFICE.

JOHN W. ll/IAOY OF CINCINNATI, OHIO.

PIANOFORTE.

SPECIFICATION forming part of Letters Patent No. 640,295, dated January 2, 1900.

Application filed September 1 1, 1898. Serial No. 690,977. (No model.)

To all whom it may concern.-

Be it known that I, JOHN WV. MAOY, a citizen of the United States, residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented new and useful Improvements in Sound -Boards for Grand Pianofortes, of which the following is a specification.

The object of my invention is to increase the quantity and enrich the quality of tone, particularly in the treble portion of the instrument; and to that end my invention con sists in the application of an edge binding of hard wood to the exposed treble edge of the sound-board.

Reference is had to the accompanying draw ing and letters of reference marked thereon. The same shows a section of the sound-board of a grand piano with my improved binding applied.

In grand piano construction the stringbridge approaches very near to the edge of the sound-board, the limited area of which at this portion and the exposed free edge of the same allows the vibrations largely to disperse at the expense of both quantity and quality of tone.

My invention consists in binding the fibers at this portion of the board with a bindingstrip a of hard wood. This strip I prefer to make triangular in shape. It is set in a groove at the edge of the sound-board c, as shown. It is glued in place and further so cured by dowels or screws d, extending through the same into the supporting-strip 6. By thus binding the fibers of the treble portion of the board the vibrations do not dis perse, but are conducted to other parts of the board, which results in a greater reinforce ment of the tone.

Having described my invention, I claim as new and desire to secure by Letters Patent 1. In grand pianos an edge-binding a set in a groove Z) at the treble edge of the soundboard c, said binding consisting of a strip of hard wood substantially as described.

2. In grand pianos a sound-board 0 having a groove 1) along the free treble edge of the same substantially as described and set forth..

3. In grand pianos the combination of the binding-strip a and the sound-board c, said sound-board having at its free edge a groove Z), the binding-strip a. being glued in place and further secured by the screws, extending through the same into the supportingstrip csubstantially as described and set forth.

JOHN IV. MACY.

Witnesses:

J. D. DE BRA, H. Kr. BLINN. 

